环境工程学报2012，Vol.6Issue(4)：1374-1380,7.
过磷酸钙与石灰混施对污染农田低累积玉米生长和重金属含量的影响
Effect of lime and superphosphate on maize production and heavy metals uptake by low-accumulating maize
摘要
Abstract
A field experiment was carried out to study effects of the combined application of lime and superphosphate on growth and heavy metals（Cd,Pb,Zn,Cu） concentration of a low-accumulating cultivar of Zea mays in a soil contaminated by wastewater from a lead/zinc mining.Changes in soil pH and available heavy metal contents after application of lime and superphosphate were also assessed.Results showed that the combined application of lime and superphosphate significantly increased the yields of Z.mays compared to the single additions.The favorable influence still exhibited in the second crop without further applications.The concentrations of Cd,Zn and Cu in grain of Z.mays were decreased by the single application of lime and the mixed application of lime and superphosphate.Furthermore,the best results was found in the treatments of the lime in the middle level（0.4 kg/m2） and the combined application of lime in high level（0.6 kg/m2） and the superphosphate in middle level（0.2 kg/m2）.They were both below the limits of Chinese food standards.While the concentration of Pb in grain of Z.mays increased with lime addition,and exceeded the limit of Chinese food standard,and the combined application with superphasphate could not significantly decrease Pb content in corn grain.However they were still conformed to the Chinese feed standard.The concentrations of Cd,Pb,Zn and Cu in stem and leaf of Z.mays were all decreased by the single lime application and the lime and superphosphate mixed application and it was safe to be served as organic fertilizer.关键词
低累积作物/玉米/过磷酸钙/石灰/重金属Key words
low-accumulating crop/Z. Mays/superphosphate/lime/heavy metals分类
资源环境引用本文复制引用
郭晓方,卫泽斌,谢方文,吴启堂..过磷酸钙与石灰混施对污染农田低累积玉米生长和重金属含量的影响[J].环境工程学报,2012,6(4):1374-1380,7.基金项目
基金项目：国家自然科学基金资助项目 （）
国家高技术研究发展计划（863）项目 （）
广东省科技计划项目 （）
